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Posted to dev@mahout.apache.org by "Andrew Palumbo (JIRA)" <ji...@apache.org> on 2015/04/25 01:42:38 UTC

[jira] [Resolved] (MAHOUT-1696) QRDecomposition.solve(...) can return incorrect Matrix types

     [ https://issues.apache.org/jira/browse/MAHOUT-1696?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andrew Palumbo resolved MAHOUT-1696.
------------------------------------
    Resolution: Fixed

pushed to master and 0.10.x branch

> QRDecomposition.solve(...) can return incorrect Matrix types
> ------------------------------------------------------------
>
>                 Key: MAHOUT-1696
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-1696
>             Project: Mahout
>          Issue Type: Bug
>          Components: Math
>    Affects Versions: 0.10.0
>            Reporter: Andrew Palumbo
>            Assignee: Andrew Palumbo
>             Fix For: 0.10.1, 0.11.0
>
>
> in QRDecomposition.java, QRDecomposition(Matrix A).solve(Matrix B) is returning a Matrix of type B when it should be returning a matrix of type A.  This can lead to Sparse Matrices which should be Dense and vice versa.   



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